Written by Ben Raab; art and cover by Charlie Adlard In stores May 7. "Black Circle: Urban Knights" - Part 5 of the 6-part crossover with GREEN LANTERN! The Mafia will shoot anything that moves! The intergalactic menace of the Black Circle will kill anyone without remorse! And the police have their backs against the wall! Enter Green Arrow and Green Lantern, just in time to find Connor and Black Canary caught in the crossfire! Meanwhile, something's gone sour within the Black Circle...as if this intergalactic organization of crime weren't already rotten enough!FC, 32 pg